rodelroberto
rodelroberto
03-11-2015
Mathematics
contestada
Verify
(2cos2x)/(sin2x) =cotx - tanx
Respuesta :
crisforp
crisforp
03-11-2015
cos2x = (cosx)^2 - (sinx)^2;
sin2x = 2sinxcosx;
Then, (2cos2x)/(sin2x) =2[ (cosx)^2 - (sinx)^2 ] / (2sinxcosx) = [ (cosx)^2 - (sinx)^2 ] / (sinxcosx) = (cosx)^2 / (sinxcosx) - (sinx)^2 / (sinxcosx) = cosx/sinx - sinx/cosx = cotx - tanx;
Answer Link
VER TODAS LAS RESPUESTAS ( 55+ )
Otras preguntas
is it possible for a distance versus-time graph to be a vertical line?
is it possible for a distance versus-time graph to be a vertical line?
A 1 digit number and a 3 digit number have a sum of 205. The same two number have a difference of 195, a product of 1,000 and a quotient of 40. What are the t
What is a direct combination reaction?
A 1 digit number and a 3 digit number have a sum of 205. The same two number have a difference of 195, a product of 1,000 and a quotient of 40. What are the t
When was William Shakespeare born
You have a cylinder with a diameter of 15 inches and a height of 12 inches. What is the volume of the largest sphere thg will fit inside it? If you can will you
A pound of seedless red grapes costs $2.75. Drew must spend less than $9.35 on a bunch of seedless red grapes.Inequality:Solution:Interpretation:
Why is RNA necessary to act as messenger?
What three islands are located off the East African coast
